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(No Model.) 4 Sheets-Sheet 1.

J. N. SHORT.

MACHINE FOR SLITTING METAL.

Patented Jan. 27 1885.

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ATTORNEY (No Model.) 4 Sheets-Sheet 2.

J. N. SHORT.

MACHINE FOR SLITTING MET AL.

Pate ted Jan. 27;, 1885.

INVENTOR. fw A ,/M

Q 1 I ATTORNEY J. N. SHORT."

Patented Jan 27,1885.

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' J. N. SHORT.

MACHINE FOR SLITTINGMETAL.

No, 311,263. Patented Jan. 27, 1885.

V UNITED STATES PATENT @FFICE.

JOHN N. SHORT, OF JOHNSTOVN, PENNSYLVANIA, ASSIGNOR TO THE OAMBRIA IRONCOMPANY, OF SAME PLACE.

MACHINE FOR SLITTlNG M ETAL.

SPECIFICATION forming part of Letters Patent No. 311,263, dated January27, 1885.

Application filrd March i25 1884. (No model.)

To (LZZ whom it may concern:

Be it known that I, JOHN N. SHORT, a citizen of the United States,residing at Johnstown, in the county of Cambria and State ofPennsylvania, haveinvented certain new and useful Improvements inMachines for Slitting Metals; and I do hereby declare that the followingis a full, clear, and exact description ofthe same, reference being hadto the accompanying drawings, forming a part of this specification, inWhich- Figure 1 is a side elevation of my improved slitting-maehine.Fig. 2 is an enlarged end view of said machine at the foot thereof. Fig.3 is an enlarged end view of said machine at the head thereof. Fig. 4 isa front view of crosshead'and head-block. Fig. 5 is a transverse sectionthroughw m of Fig. 4.. Fig. 6 is a crosssection of top ofmachine,showing plate, knives, holding-levers, and piece to be operatedupon. Fig. 7 is a similar section showing set-screws. Fig. 8 is adetached view of rotary cutter and shaft. Fig. 9 is a side view ofrotary cutter. Fig. 10 shows detached views of sweep, being front andside of the same. Fig. 11 is a transverse section through 3/ y of Fig.1.

My improved slitting-machine is more particularly described by referenceto the drawings, as follows:

A is the bed of the machine, supported by feet B B B, or in any othersuitable manner, and it is provided with longitudinal V-shaped grooves,as shown at a a.

0 is the platen, provided with projections b b fitting into thecorresponding grooves, act, of the bed.

D is a plate attached to the upper surface of the platen.

E E are knives running the entire length of the plate D. They are heldfirmly in position by screws 0 c, 850., and butt against set-screws d,&c. These knives do not touch each other, there being a space, 6,between them equal to thethickness of circular knife M. The position ofthese knives E E may be varied by means of the set-screws (1,850. On thetop of these knives is the piece of metal to be operated upon. (Shown atF F after it has been slit.)

G G are levers operated by screws f f for holding the piece in position.In the plate D there is a slot, 9, running its entire length directlybeneath the space 6 between the knives, and intended to take the sectionof metal removed by the knives.

H H are uprights secured to the sides ofthe bed A, supporting cross-headI, to which is fitted head-block K, which head-block may be raised andlowered by means of the screws 71- It, and is securedin any position bybolts 1 t. The central portion of head-block K is cut away, and at eachside of this opening are boxes is k, to furnish bearings for the spindleL, which carries the narrow circular knife M, between washers Z Z. N isasweep, having its end or lower extremity in the shape of a T, formed sothat when itisthrown down the pointm will pass between the knives E Eand into the slot the side projections, 11. n, then being in positionjust above the knives E E.

In Fig. l the sweep N is represented by dotted lines in the position itoccupies when not in use'z'. 0.,when the machine is cutting-the levers pp and fins q qserving to throw it down on the arrival of the platen atthe end of its cutting stroke, and to throw it up when the platen comesto the end of its return-stroke.

l? P are rollers secured to a short shaft, R. which revolvesin bearings1" r in the sides of the bed of the machine, directly under the spin dleL and parallel with it. The bo'Xes or bearings r r in which shaft Rturns are movable, and may be raised and lowered by means of wedgesSoperated by set-screws t, &c. These rollers support the platen, andtheir function is to take the strain of the cutting from the other partsof the machine.

Between the projectionsb b of the platen, and on its under side,areattached in a suitable manner the two nuts 8 8, through which nutspasses a threaded shaft, T, which rotates in suitable bearings at eachend of the machine.

U is a gear-wheel which meshes with a small er gear-wheel, u, secured toa short countershaft,V, rotating in suitable bearings and carrying fourpulleys, '0 o l2 12 two of which are tight and two are loose. Thesepulleys are driven by belts from a counter-shaft overhead. There will betwo belts, one straight and one crossed, occupying a tight and loose,and two loose pulleys, respectively. I do not confine myself to thisarrangement, as any other suitable driving-gear may be used.

\V is a bar running the entire length of the machine and occupying aposition just under the outer edge of the platen. To this bar areattached the belt shifters, the bar being moved backward and forwardeither by hand or by adjustable stops suitablyloeated on the platen.This bar also carries the pins q q,which operate the levers p p, bywhich the sweep N is thrown down and elevated.

The operation of this machine is described as follows: The platen Obeingat the left-hand end or head of the 1naehine, and the plate D, with theknivesE E. having been bolted to their proper places, the piece of metalto be cut is slipped in between the top of the knives E E and the innerends of the levers G G. The screwsff are then turned in such a manner asto raise the outer ends of the leversG G, thus bringing a pressure tobear upon the upper side of the metal to be cut, holding it firmly in aproper position. During" this time both belts are on the loose pulleysat the right-hand end or foot of the machine. All being ready, the beltsare thrown by hand and by a movement of the bar \V to run upon a tightand loose pulley. The platen O is thereby given a motion to theright,whieh carries it, with the attached piece of metal, underthe'cross-head I and the circular knife M, and the joint operation ofthis knife and theknives EEi-emoves a narrow strip from the metal, whichstrip is pressed down between the knives E E into the slot 9. The platenhaving passed out from under the knife M, the belts are thrown upon theloose pulleys by means of pins in the bar IV and platen O, which come incontact with each other. The screws f f are then loosened and the beltsthrown by hand to such a position as to give the platen a motion to theleft. At the same time a pin properly located in the bar W acts upon theextremity of the bell-crank leverp,and therebylowers thesweep Nto such aposition that the T-shaped extremity of the same will push the pieces ofslit metal and the chip out from under the levers G G and out of theslot The platen having completed its return motion to its firstposition, the belts are thrown automatically upon the loose pulleys andthe machineis thereby stopped. The op eration is then repeated forslitting another piece of metal in the same manner.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is i 1. The circular cutter M, secured uponthe spindle L, and rotated by friction with the piece being operatedupon, in combination with two flat cutters or knives provided with meansfor operating the same, substantially as and for the purpose set forth.

2. The combination of a circular cutter, M, head-block K, flat cuttersor knives E E, and platen O, substantially as and for the purpose setforth.

8. The combination of the platen O, operated by a screw or other means,the knives E E, and adjustable pressure-rollers P P, substantially asand for the purpose set forth.

JOHN N. SHORT.

W'itnesses:

GEO. 0. JORDAN, J as. M. SWANK, Jr.

